The 20 megabyte file size download restriction over 3G that will affect Sony's portable PS Vita at its Japanese launch will also extend to North America, the company confirmed Wednesday.

During a talk that outlined much of Sony's launch strategy for the device, Sony's Chris Norden confirmed the news (as reported at GameSpot), but clarified that the limitation comes from Sony's 3G partner, AT&T, and not from Sony itself.

The PS Vita will ship with two SKUs: one that connects over Wi-Fi only, and one that connects through both Wi-Fi and 3G. There will be no download restrictions over Wi-Fi.

When the news was reported in Japan last month, a representative said at the time that the restriction was only guaranteed for launch, and could be lifted in the future.

For reference, 20 megabytes is also the download size restriction for iOS devices over 3G, as well as many other consumer devices.